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Abstract

Methods are described for the production of a muffle for precision or model casting having the following steps: preparation of a pattern preparation of an investment, comprising a mixture of: a) a dispersing agent, b) a ceramic powder containing (i) a fraction having a diameter of less than 500 nm (nanoceramic powder fraction) in a proportion of 2-74% (V/V), based on the volume of the total mixture, and (ii) a fraction having a diameter of more than 500 nm (microceramic powder fraction) in a proportion of 2-74% (V/V), based on the volume of the total mixture c) optionally a metal powder consisting of metals and/or alloys and/or intermetallic compounds, d) optionally one or more further additives and e) optionally inorganic or organic binder investing or covering the pattern with the investment solidification of the investment investing or covering the pattern by a) freezing, b) gelling, in particular on the basis of a change in pH value and/or c) dehydrating, during and/or after the solidification, drying the investment investing or covering the pattern by removing the dispersing agent and optionally other volatile constituents removal of the pattern from the dry investment and heating the dried investment so that a muffle for the precision or model casting results.

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